Question

我有两张桌子。（1）ENQUIRY，（2）FOLLOW_UP。我必须在视图中将FOLLOW_UP的数据存储在MAX(VISITOR_ID)。我的视图已成功创建，我可以在phpMyadmin中查看数据。

（1）ENQUIRY表

$enq = " CREATE TABLE IF NOT EXISTS ENQUIRY (
        ID BIGINT PRIMARY KEY AUTO_INCREMENT ,
        LONGDATE BIGINT,
        UNAME VARCHAR(200) ,
        ADDRESS VARCHAR(200) ,
        STATE VARCHAR(60) ,
        ZIP VARCHAR(20) ,
        PHONE VARCHAR(100) ,
        AGE INTEGER ,
        SEX VARCHAR(6) ,
        DOB_DATE INTEGER ,
        DOB_MONTH INTEGER ,
        DOB_YEAR INTEGER ,
        MARITAL_STATUS VARCHAR(30),
        BLOOD_GROUP VARCHAR(10),
        EMAIL VARCHAR(200),
        IS_MEMBER VARCHAR(3) DEFAULT 'NO' ,
        REF_SOURCE VARCHAR(150) ,
        REFERENCE VARCHAR(150),
        LAST_FOLLOWUP BIGINT DEFAULT 0,
        CREATE_BY VARCHAR(100),
        CREATE_ON BIGINT,
        SERVER INTEGER DEFAULT 0)";

（2）FOLLOW_UP TABLE

$enq = " CREATE TABLE IF NOT EXISTS FOLLOW_UP (
    ID BIGINT PRIMARY KEY AUTO_INCREMENT , 
    VISITOR_ID BIGINT ,  
    VISITOR_NAME VARCHAR(200) ,  
    LONGDATE BIGINT ,  
    FEED_BACK VARCHAR(200) ,              
    NEXT_CONTACT BIGINT ,     
    FEED_BACK_SUMMARY VARCHAR(80) ,  
    FOLLOWUP_BY VARCHAR(80),  
    SERVER INTEGER DEFAULT 0)";

我的观点如下：

$enq = "CREATE OR REPLACE VIEW F_TOFOLLOW 
AS SELECT 
FOLLOW_UP.ID, 
FOLLOW_UP.LONGDATE, 
FOLLOW_UP.VISITOR_ID, 
ENQUIRY.UNAME, 
FOLLOW_UP.FEED_BACK, 
FOLLOW_UP.FEED_BACK_SUMMARY, 
FOLLOW_UP.FOLLOWUP_BY, 
FOLLOW_UP.NEXT_CONTACT, 
ENQUIRY.CREATE_BY, 
ENQUIRY.IS_MEMBER 

FROM FOLLOW_UP 
INNER JOIN ENQUIRY ON FOLLOW_UP.VISITOR_ID = ENQUIRY.ID 
WHERE FOLLOW_UP.ID = (SELECT MAX(ID) FROM 
FOLLOW_UP F WHERE F.VISITOR_ID = FOLLOW_UP.VISITOR_ID)";

现在我正在尝试从视图中运行查询：

$Q = "SELECT COUNT(*) AS TOFOLLOW FROM F_TOFOLLOW";

我尝试执行的任何查询都非常非常慢。我大部分时间都得到了：

SQLSTATE [HY000]：常规错误：2006 MySQL服务器已经消失

有人建议我在mysql配置中更新max_allowed_packet，但在共享主机中无法这样做。

类似的观点运行良好。我的代码出了什么问题？有什么方法可以解决这个问题吗？

从视图查询在mysql中非常慢

0 个答案: